Skip to main content

4 Carat Cushion Cut Diamond

to
228
1,337
866
547
513
329
1,851
558
478
188
236
4
174
667
1,119
55
37
82
86
27
43
25
12
34
29
4
1,242
717
13
1167
133
80
65
37
to
54
26
25
22
13
370
290
284
159
82
50
15
15
12
4
1
1
1
1
1,966
6
1,333
441
Sort By
GIA Certified Fancy Yellow 4 Carat Cushion Cut Diamond Studs
By Antinori Fine Jewels
Located in Chicago, IL
GIA Certifed Fancy Yellow 4 Carat Cushion Cut Diamond Studs
Category

2010s Unknown Contemporary Clip-on Earrings

Materials

Diamond, Yellow Diamond

4 1/4 Carat Cushion Cut Diamond Eternity Ring H/VS
Located in Los Angeles, CA
This 4.25 Ct. Tw. cushion cut diamond eternity ring consists of exquisite cushion cut diamonds in
Category

2010s Wedding Rings

Materials

Diamond, Gold, 14k Gold, Rose Gold, White Gold, Yellow Gold

GIA Certified 4 Carat Fancy Intense Yellow Cushion Cut Diamond Yellow Gold Ring
By Antinori Fine Jewels
Located in Chicago, IL
Sanpietro. It features a magnificent 4-carat cushion cut diamond, boasting a Fancy Intense Yellow color and
Category

2010s Unknown Modern Cocktail Rings

Materials

Diamond, Yellow Gold, 18k Gold, Gold

Internally Flawless GIA Certified 4 Carat Fancy Yellow Diamond Ring
By Antinori Fine Jewels
Located in Chicago, IL
-carat cushion-cut diamond, with its Fancy Yellow hue and flawless clarity, stands as a symbol of rare
Category

2010s Unknown Contemporary Engagement Rings

Materials

Yellow Diamond, White Diamond, Diamond, Yellow Gold, White Gold, 18k Gold

GIA Certified 4 Carat Fancy Intense Yellow Cushion Cut Diamond Ring
By Antinori Fine Jewels
Located in Chicago, IL
GIA Certified 4 Carat Fancy Intense Yellow Cushion Cut Diamond Ring
Category

2010s Italian Modern Solitaire Rings

Materials

Yellow Diamond, Diamond, Yellow Gold, White Gold, 18k Gold

GIA Certified 4 Carat Fancy Yellow Cushion Cut Diamond Studs Set in 18 Carats
By Antinori Fine Jewels
Located in Chicago, IL
GIA Certified 4 Carat Fancy Yellow Cushion Cut Diamond Studs set in 18 Carats
Category

2010s Italian Modern Stud Earrings

Materials

Diamond, Yellow Diamond, 18k Gold, Yellow Gold

13.38 Carat Cushion Cut Diamond Eternity Band
Located in New York, NY
Finely crafted in platinum with 13 GIA certified Cushion cut Diamonds weighing a total of 13.38
Category

21st Century and Contemporary Wedding Rings

Materials

Diamond, Platinum

GIA Certified 4 Carat F Color Cushion Cut Diamond White Gold Ring
By Antinori Fine Jewels
Located in Chicago, IL
Amazing ring with 4 carat diamond and baguette diamond side stones. Setting in 18k white gold
Category

2010s Unknown Modern Engagement Rings

Materials

Diamond, White Gold, 18k Gold, Gold

6 Carat Cushion Blue Topaz 18 Karat White Gold 0.38 Carat Diamond Halo Ring
By Hasbani Diamonds
Located in London, GB
An impressive 6 Carat (approximately) Cushion Cut Blue Topaz Dress / Engagement Ring surrounded by
Category

2010s British Modern Engagement Rings

Materials

Blue Topaz, Diamond, Topaz, White Diamond, Gold, White Gold, 18k Gold

GIA Certified 3/4 Carat Cushion Cut Platinum Pendant
By Lili Jewelry
Located in New York, NY
3/4 ct Diamond set in 4 prong low basket. 18" platinum chain with a safety lock. Diamond quality
Category

21st Century and Contemporary American Contemporary Pendant Necklaces

Materials

Diamond, Platinum

4 Carats Cushion Cut Yellow Diamond Eternity Wedding Band 14K White Gold
Located in New York, NY
cushion cut natural fancy yellow diamonds with SI/I clarity and a total weight of 2.77 carats, each
Category

2010s American Modern Wedding Rings

Materials

Yellow Diamond, White Diamond, Yellow Gold, White Gold, 14k Gold

3 Carat GIA Certificate G Color Cushion Diamond Platinum Bespoke Engagement Ring
By Hasbani Diamonds
Located in London, GB
A bespoke 3.00 carat cushion cut diamond engagement ring with the perfect combination of elegance
Category

2010s British Modern Engagement Rings

Materials

Diamond, Platinum

3 Carat GIA Certificate E Color Cushion Diamond Platinum Bespoke Engagement Ring
By Hasbani Diamonds
Located in London, GB
A bespoke ring with one of the best colors and clarity center diamond, 3.00 carat cushion cut
Category

2010s British Modern Engagement Rings

Materials

Diamond, Platinum

GRS Ct. 4 Ct. Cushion Cut Mozambique Ruby Diamond Choker Necklace
Located in Chicago, IL
Suspending a detachable pendant featuring a cushion-shaped ruby, framed by pear and round diamonds
Category

2010s American Contemporary Choker Necklaces

Materials

Diamond, Ruby, Platinum

5.50ct Cushion Blue Topaz Engagement Ring 0.66 Carat Round Diamond in 18ct Gold
By Hasbani Diamonds
Located in London, GB
This Stunning 5.50ct Cushion Cut Blue Topaz Engagement Ring set in 18ct White Gold with Four Claws
Category

2010s British Modern Engagement Rings

Materials

Topaz, White Diamond, Gold, 18k Gold, White Gold

2.01 Carat GIA Cushion Cut Diamond Ring Platinum
Located in New York, NY
GIA Certified: 1.01ct. Cushion Cut Brilliant diamond ring Report: 2145777278 I-color Si-1
Category

2010s American Solitaire Rings

Materials

Diamond, Platinum

GIA Certified 4 Carat Fancy Intense Yellow Diamond Ring
By Diamond Scene New York
Located in New York, NY
Stunning cushion cut 4.30 carat GIA certified Fancy Intense Yellow diamond, SI2. Set with 1.10
Category

21st Century and Contemporary Engagement Rings

Materials

Yellow Diamond

GIA Certified 4 Ct. Fancy Yellow Cushion Cut Diamond Ring I FLAWLESS
Located in Chicago, IL
exquisite beauty of this striking engagement ring, featuring a stunning 4-carat cushion cut fancy
Category

2010s American Engagement Rings

Materials

Diamond, White Diamond, Yellow Diamond, 18k Gold, Platinum

Cushion Mixed-Cut Sapphire 4, 32ct no heat and Diamond Ring
Located in Firenze, IT
Centering a cushion mixed-cut sapphire, weighing 4,32 carats, within a round and baguette-cut
Category

Vintage 1950s Italian Retro Cluster Rings

Materials

Sapphire, Diamond, White Gold, 18k Gold

2.93 Carat Cushion Cut Tanzanite Diamond White Gold Ring
By DGI
Located in Los Angeles, CA
This ring has a gorgeous Cushion Cut Tanzanite weighing 2.69 Carats. The 4 baguettes on the side
Category

2010s American Contemporary Engagement Rings

Materials

Diamond, Tanzanite, 18k Gold, White Gold

14 Karat Gold Petite Organic Design Cushion Diamond Ring Center, 3/4 Carat
Located in San Francisco, CA
: 6.8X4.8 Center Gemstone Color: WHITE Center Gemstone Shape: Elongated Cushion Center Diamond Carat Weight
Category

21st Century and Contemporary American Engagement Rings

Materials

Diamond, Yellow Gold

Rare Colors 4 Carat Fancy Yellow Elongated Cushion Diamond Three Stone Ring
By Rare Colors
Located in New York, NY
Embrace the beauty of rarity with our 4-Carat Fancy Yellow Elongated Cushion Diamond Three-Stone
Category

2010s Three-Stone Rings

Materials

Diamond, 18k Gold, Platinum

GRS Unheated 4.04 Carat Cushion Cut Ruby in Platinum with Diamonds
Located in La Jolla, CA
GRS Certified 4.04 Carat Unheated Cushion Cut Ruby in Platinum Three- Stone Ring with Diamonds
Category

21st Century and Contemporary American Three-Stone Rings

Materials

Diamond, Ruby, Platinum

Platinum 0.40 Carat Round Diamond Twisted Love 4 Prong Bespoke Engagement Ring
By Hasbani Diamonds
Located in London, GB
Certificate Clarity: SI (eye clean) Cut: Round Cut Top Width: 4 mm (widest point) Made by Hasbani Diamonds
Category

2010s British Modern Engagement Rings

Materials

Blue Sapphire, Pink Sapphire, Yellow Sapphire, Green Sapphire, Tanzanite...

14 Karat Gold Cushion Teal Sapphire Vintage Diamond Ring Center, 3/4 Carat
Located in San Francisco, CA
blue cushion shape sapphire, accented with round brilliant diamonds. Experience the difference in
Category

21st Century and Contemporary American More Rings

Materials

Diamond, Sapphire, Yellow Gold

0.94 Carat Platinum Engagement Round Diamond Bespoke Fancy Vine 4 Prong Ring
By Hasbani Diamonds
Located in London, GB
Diamonds. Set in an open gallery 4 prong mount with a split shank that has one plain branch under a diamond
Category

2010s British Modern Engagement Rings

Materials

Blue Sapphire, Pink Sapphire, Yellow Sapphire, Green Sapphire, Tanzanite...

0.50 Carat Round Diamond Bespoke Twisted Love 4 Prong Platinum Engagement Ring
By Hasbani Diamonds
Located in London, GB
Diamonds. Set in an open gallery 4 prong mount with a split shank that has one plain branch under a diamond
Category

2010s British Modern Engagement Rings

Materials

Blue Sapphire, Pink Sapphire, Yellow Sapphire, Green Sapphire, Tanzanite...

Platinum Engagement 0.68 Carat Round Diamond Bespoke Twisted Love 4 Prong Ring
By Hasbani Diamonds
Located in London, GB
Diamonds. Set in an open gallery 4 prong mount with a split shank that has one plain branch under a diamond
Category

2010s British Modern Engagement Rings

Materials

Blue Sapphire, Pink Sapphire, Yellow Sapphire, Green Sapphire, Tanzanite...

Platinum Engagement 0.82 Carat Round Diamond Bespoke Fancy Twist 4 Prong Ring
By Hasbani Diamonds
Located in London, GB
Diamonds. Set in an open gallery 4 prong mount with a split shank that has one plain branch under a diamond
Category

2010s British Modern Engagement Rings

Materials

Blue Sapphire, Pink Sapphire, Yellow Sapphire, Green Sapphire, Tanzanite...

Art Deco 1.02 carat cushion cut diamond platinum engagement ring
Located in Beverly Hills, CA
This Art Deco platinum engagement ring showcases a 1.02-carat GIA-certified cushion-cut diamond
Category

Vintage 1930s Art Deco Engagement Rings

Materials

Diamond, Platinum

Elegant GIA 0.89 carat cushion cut diamond platinum engagement ring
Located in Beverly Hills, CA
Certificate: GIA #2235376796 Center stone: Cushion cut diamond Weight: 0.89 carat Color: K Clarity
Category

Vintage 1930s Art Deco Engagement Rings

Materials

Diamond, Platinum

GIA Certified 4 Carat Fancy Light Yellow Cushion Diamond Ring I Flawless
By Antinori Fine Jewels
Located in Chicago, IL
Exquisite solitaire fancy yellow cushion cut diamond with two sidetrillion cut diamonds and set in
Category

2010s Italian Solitaire Rings

Materials

Diamond, White Diamond, 18k Gold, White Gold, Yellow Gold

14 Karat Yellow Gold Elongated Cushion Pink Diamond Ring Center, 4/5 Carat
Located in San Francisco, CA
pink elongated cushion shape sapphire, accented with round brilliant diamonds. Experience the
Category

21st Century and Contemporary American More Rings

Materials

Diamond, Sapphire, Yellow Gold

GIA Certified Platinum Cushion Cut Diamond Engagement Ring 0.81 Carat
Located in London, GB
A beautiful platinum cushion cut diamond ring. The platinum ring comprises of a cushion cut diamond
Category

21st Century and Contemporary Engagement Rings

Materials

Diamond, Platinum

14 Karat White Gold Petite Organic Design Cushion Diamond Ring Center, 3/4 Carat
Located in San Francisco, CA
: 6.8X4.8 Center Gemstone Color: WHITE Center Gemstone Shape: Elongated Cushion Center Diamond Carat Weight
Category

21st Century and Contemporary American Engagement Rings

Materials

Diamond, White Gold

14 Karat Rose Gold Petite Organic Design Cushion Diamond Ring Center, 3/4 Carat
Located in San Francisco, CA
: 6.8X4.8 Center Gemstone Color: WHITE Center Gemstone Shape: Elongated Cushion Center Diamond Carat Weight
Category

21st Century and Contemporary American Engagement Rings

Materials

Diamond, Rose Gold

GIA 1.71 Carat Cushion Cut Diamond Ring Platinum I/VS
Located in New York, NY
GIA 1.01ct cushion cut diamond ring. I-color vs-2 clarity Report Id: 2145776879 Please see
Category

2010s American Solitaire Rings

Materials

Diamond, Platinum

Platinum 7.52 Carat Cushion Cut Blue Sapphire and Diamond Engagement Ring
Located in Miami, FL
: 10.21 grams  Stone Details:  - Gemstone: Blue Sapphire - Carat: 7.52 - Color: Blue - Cut: Cushion
Category

21st Century and Contemporary Art Deco Engagement Rings

Materials

Diamond, Sapphire, Blue Sapphire, Platinum

0.83 Carat Round Diamond Twisted 18 Karat White Gold 4 Prong Engagement Ring
By Hasbani Diamonds
Located in London, GB
ring. Handmade in 18 Karat White Gold, with a total of 0.83 Carat White Diamond. Set in an open gallery
Category

2010s British Modern Engagement Rings

Materials

Blue Sapphire, Pink Sapphire, Yellow Sapphire, Green Sapphire, Tanzanite...

0.95 Carat Round Diamond Twisted 18 Karat White Gold 4 Prong Engagement Ring
By Hasbani Diamonds
Located in London, GB
ring. Handmade in 18 Karat White Gold, with a total of 0.95 Carat White Diamond. Set in an open gallery
Category

2010s British Modern Engagement Rings

Materials

Blue Sapphire, Pink Sapphire, Yellow Sapphire, Green Sapphire, Tanzanite...

0.70 Carat Round Diamond Twisted 18 Karat White Gold 4 Prong Engagement Ring
By Hasbani Diamonds
Located in London, GB
ring. Handmade in 18 Karat White Gold, with a total of 0.70 Carat White Diamond. Set in an open gallery
Category

2010s British Modern Engagement Rings

Materials

Blue Sapphire, Pink Sapphire, Yellow Sapphire, Green Sapphire, Tanzanite...

1.20 Carat Round Diamond Twisted 18 Karat White Gold 4 Prong Engagement RIng
By Hasbani Diamonds
Located in London, GB
ring. Handmade in 18 Karat White Gold, with a total of 1.20 Carat White Diamond. Set in an open gallery
Category

2010s British Modern Engagement Rings

Materials

Blue Sapphire, Pink Sapphire, Yellow Sapphire, Green Sapphire, Tanzanite...

1.68 Carat Round Diamond Twisted 18 Karat White Gold 4 Prong Engagement Ring
By Hasbani Diamonds
Located in London, GB
ring. Handmade in 18 Karat White Gold, with a total of 1.68 Carat White Diamonds. Set in an open
Category

2010s British Modern Engagement Rings

Materials

Blue Sapphire, Pink Sapphire, Yellow Sapphire, Green Sapphire, Tanzanite...

1.45 Carat Round Diamond Twisted 18 Karat White Gold 4 Prong Engagement Ring
By Hasbani Diamonds
Located in London, GB
ring. Handmade in 18 Karat White Gold, with a total of 1.45 Carat White Diamonds. Set in an open
Category

2010s British Modern Engagement Rings

Materials

Blue Sapphire, Pink Sapphire, Yellow Sapphire, Green Sapphire, Tanzanite...

2.18 Carat Round Diamond Twisted 18 Karat White Gold 4 Prong Engagement Ring
By Hasbani Diamonds
Located in London, GB
ring. Handmade in 18 Karat White Gold, with a total of 2.18 Carat White Diamonds. Set in an open
Category

2010s British Modern Engagement Rings

Materials

Blue Sapphire, Pink Sapphire, Yellow Sapphire, Green Sapphire, Tanzanite...

0.50 Carat Round Diamond Twisted 18 Karat White Gold 4 Prong Engagement Ring
By Hasbani Diamonds
Located in London, GB
ring. Handmade in 18 Karat White Gold, with a total of 0.51 Carat White Diamond. Set in an open gallery
Category

2010s British Modern Engagement Rings

Materials

Topaz, Multi-gemstone, Peridot, Ruby, Sapphire, Blue Sapphire, Pink Sapp...

GIA Certified Engagement Ring with 6.11 Carat Yellow Cushion Cut Diamond
By Simon Ardem
Located in New York, NY
Diamond ring with GIA certificate, no.1162257236. Center stone: 6.11ct Cushion cut Fancy to Fancy
Category

21st Century and Contemporary American Contemporary Bridal Rings

Materials

Diamond, White Diamond, Yellow Diamond, 18k Gold, Yellow Gold, Platinum

5.48 Carat Cushion Brilliant and Other Cut Diamond Platinum Engagement Ring
Located in New York, NY
Number of Stones: 12 Color: H Clarity: VS1 Shape: Round Brilliant Gemstone 3: 4 Carat Diamond
Category

20th Century Engagement Rings

Materials

Diamond, Platinum

GIA Certified 2.02 Carat Cushion Cut Fancy Greenish Yellow Diamond Ring
By Gad & Co.
Located in Miami, FL
GIA Certified 2.02 Carat Cushion Cut Fancy Greenish Yellow Diamond Ring. Set with a colorful array
Category

2010s American Modern Engagement Rings

Materials

Pink Diamond, Yellow Diamond, White Diamond, White Gold, Rose Gold, 18k ...

14 Karat Gold Cushion Pink Sapphire and Diamond Halo Ring Center 3/4 Carat
Located in San Francisco, CA
Shape: Elongated Cushion Side Gemstone Type: NATURAL DIAMOND Side Gemstone Shape: ROUND Metal: 14K
Category

21st Century and Contemporary American More Rings

Materials

Diamond, Sapphire, Yellow Gold

Stunning 5.28 Carat Cushion Cut Sapphire Diamond Gold Engagement Ring
Located in New York, NY
Made of 18k yellow gold, this ring is centered with a vivid blue cushion cut Ceylon sapphire that
Category

20th Century Engagement Rings

Materials

Diamond, Sapphire, 18k Gold, Yellow Gold

0.40 Carat Round Diamond Twisted Love 18 Karat Rose Gold 4 Prong Engagement Ring
By Hasbani Diamonds
Located in London, GB
(eye clean) Cut: Round Cut Top Width: 4 mm (widest point) Made by Hasbani Diamonds London. We believe
Category

2010s British Modern Engagement Rings

Materials

Blue Sapphire, Pink Sapphire, Yellow Sapphire, Green Sapphire, Tanzanite...

0.95 Carat Round Diamond Twisted 18 Karat Rose Gold 4 Prong Love Engagement Ring
By Hasbani Diamonds
Located in London, GB
ring. Handmade in 18 Karat Rose Gold, with a total of 0.95 Carat White Diamond. Set in an open gallery
Category

2010s British Modern Engagement Rings

Materials

Blue Sapphire, Pink Sapphire, Yellow Sapphire, Green Sapphire, Tanzanite...

1.20 Carat Round Diamond Twisted 18 Karat Rose Gold 4 Prong Engagement Love Ring
By Hasbani Diamonds
Located in London, GB
ring. Handmade in 18 Karat Rose Gold, with a total of 1.20 Carat White Diamond. Set in an open gallery
Category

2010s British Modern Engagement Rings

Materials

Blue Sapphire, Pink Sapphire, Yellow Sapphire, Green Sapphire, Tanzanite...

Art Deco GIA 1.54 Carat Cushion Cut Diamond Platinum Engagement Ring
Located in Beverly Hills, CA
Certificate: GIA #6472165798 Center Stone: Cushion Cut Diamond Weight: 1.54 Carat Color: J Clarity
Category

Vintage 1930s Art Deco Engagement Rings

Materials

Diamond, Platinum

GIA Certified Platinum Cushion Cut Diamond Studs 1.00 Carat Total
By Lili Jewelry
Located in New York, NY
1 CT diamonds set in low basket 4 prong push back style. GIA certificates for each diamond color
Category

21st Century and Contemporary American Contemporary Stud Earrings

Materials

Diamond, Platinum

Platinum Diamond 9.70 Carat Cushion Cut Indicolite Tourmaline Engagement Ring
Located in Los Angeles, CA
. Stones- 1 Genuine Cushion Cut Indicolite Tourmaline 9.70 Carats, 8 Round Diamonds 4 Square Baguette
Category

21st Century and Contemporary American Art Deco Engagement Rings

Materials

Diamond, Tourmaline, Indicolite, Platinum

Edwardian Inspired 2.06 Carat Cushion Cut Sapphire Diamond Platinum Cluster Ring
Located in Beverly Hills, CA
Center Stone: Sapphire Cut: Cushion Cut Weight: 2.06 Carat Color: Deep Blue Accent Stone: 18
Category

Vintage 1920s Edwardian Cocktail Rings

Materials

Diamond, Sapphire, Platinum

14 Karat Yellow Gold Cushion Pink Sapphire Vintage Diamond Ring Center-3/4 Carat
Located in San Francisco, CA
Origin: SRI LANKA Center Gemstone Shape: Elongated Cushion Side Gemstone Type: NATURAL DIAMOND Side
Category

21st Century and Contemporary American More Rings

Materials

Pink Sapphire, Sapphire, Diamond, Yellow Gold

Contemporary 1.47 Carats Cushion Cut Ruby Diamond Platinum Square Halo Ring
Located in Philadelphia, PA
Centering a cushion cut ruby weighing 1.08 carats total - transparent medium purplish red in color
Category

Early 2000s Contemporary Cluster Rings

Materials

Diamond, White Diamond, Ruby, Platinum

  • 1
  • ...
Get Updated with New Arrivals
Save "4 Carat Cushion Cut Diamond", and we’ll notify you when there are new listings in this category.

4 Carat Cushion Cut Diamond For Sale on 1stDibs

You are likely to find exactly the 4 carat cushion cut diamond you’re looking for on 1stDibs, as there is a broad range for sale. Every item for sale was constructed with extraordinary care, often using Gold, 18k Gold and Platinum. Find an antique version now, or shop for 462 vintage or 1330 modern creation for a more contemporary example of these cherished accessories. You’re likely to find the perfect 4 carat cushion cut diamond among the distinctive items we have available, which includes versions made as long ago as the 18th Century as well as those produced as recently as the 21st Century. For this particular piece, .5 Carat and 1 Carat are consistently popular carat weights. There have been many well-made iterations of the classic 4 carat cushion cut diamond over the years, but those made by Single Stone, Roman Malakov and Mark Broumand are often thought to be among the most beautiful. A cushion cut version of this piece has appeal, but there are also antique cushion cut and round cut versions for sale. There aren’t many items for men if you’re seeking a 4 carat cushion cut diamond, as most of the options available are for women and unisex.

How Much is a 4 Carat Cushion Cut Diamond?

On average, a 4 carat cushion cut diamond at 1stDibs sells for $15,135, while they’re typically $350 on the low end and $2,895,000 for the highest priced versions of this item.

The Legacy of Diamond in Jewelry Design

Antique diamond rings, diamond tiaras and dazzling vintage diamond earrings are on the wish lists of every lover of fine jewelry. And diamonds and diamond jewelry are primarily associated with storybook engagements and red-carpet grand entrances — indeed, this ultra-cherished gemstone has a dramatic history on its hands.

From “A Diamond Is Forever” to “Diamonds Are a Girl’s Best Friend,” pop culture has ingrained in our minds that diamonds are the most desired, the most lasting and the most valuable gemstone. But what makes the diamond so special? Each stone — whether it’s rubies, sapphires or another stone — is unique and important in its own right. April babies might claim diamonds for themselves, but just about everyone wants this kind of sparkle in their lives!

There are several factors that set diamonds apart from other stones, and these points are important to our gem education.

Diamonds are minerals. They are made up of almost entirely of carbon (carbon comprises 99.95 percent; the remainder consists of various trace elements). Diamonds are the hardest gemstones, ranking number 10 on the Mohs Hardness Scale. Even its name, diamond, is rooted in the Greek adamas, or unconquerable. The only object that can scratch a diamond is another diamond. Diamonds are formed deep within the earth at very high temperatures (1,652–2,372 degrees Fahrenheit at depths between 90 and 120 miles beneath the earth’s surface) and are carried up by volcanic activity. Diamonds are quite rare, according to the Gemological Institute of America, and only 30 percent of all the diamonds mined in the world are gem quality.

In the 1950s, the Gemological Institute of America developed the 4Cs grading system to classify diamonds: clarity, color, cut and carat weight. Not all diamonds are created equal (there are diamonds, and then there are diamonds). The value of the diamond depends on the clarity (flawless diamonds are very rare but a diamond's value decreases if there are many blemishes or inclusions), color (the less color the higher the grade), cut (how the diamond’s facets catch the light, certain cuts of diamonds show off the stone better than others) and carat weight (the bigger, the better).

When you start shopping for a diamond engagement ring, always prioritize the cut, which plays the largest role in the diamond's beauty (taking the time to clean your diamond ring at least every six months or so plays a role in maintaining said beauty). And on 1stDibs, a range of buying guides can be found for those in the market for antique engagement ringsvintage engagement rings or Art Deco engagement rings

Shop antique and vintage diamond rings, diamond necklaces and other extraordinary diamond jewelry on 1stDibs.